[Bug libstdc++/127425] testsuite: __gnu_test::semaphore exits 0 when SysV semaphores are unavailable, so 10 tests report PASS without executing

[redi at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=127425

--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Patch posted:
https://gcc.gnu.org/pipermail/gcc-patches/2026-September/731534.html